| Hi,
The pinky hook may be the giveaway clue on this one, for they were not employed until the early '30s generally. Also, the rotary valve that changed the horn to "A" was a passing fad of the '20's and early '30s.
Naturally, there were some variants in that time frame, but I expect the horn was made between about 1920-1935. If pushed harder, I'd probably guess 1925-1930.
The horn also employs the narrow F. Besson wrap that soon came to be employed by virtually all trumpet makers for what a trumpet should look and sound like. Generally the best trumpets of this design stuck with the narrow wrap until the '50's before employing a slightly "taller" tuning slide variation so copied today.
Enjoy!
Tom |